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Apostrophes may be tiny, but they show up on the SAT surprisingly often.
And while apostrophe questions can look intimidating, most of them come down to one simple idea:
Does something belong to someone?
If the answer is yes, you’re probably dealing with a possessive apostrophe.
The SAT loves testing this concept because a single apostrophe can completely change the meaning of a sentence. Fortunately, once you understand how possession works, many of these questions become much easier.
The Main Purpose of a Possessive Apostrophe
A possessive apostrophe shows ownership.
In other words, it tells us that something belongs to someone or something else.
Example:
The student’s calculator was left on the desk.
The calculator belongs to the student.
The apostrophe helps show that relationship.
Whenever you see a possessive apostrophe, try asking:
Who owns what?
That’s the question the SAT wants you to answer.
Singular Possessive Nouns
When one person, place, or thing owns something, add:
apostrophe + s
Examples:
The author’s novel became a bestseller.
The athlete’s training paid off during the championship.
The company’s website was redesigned last year.
In each example, one person or thing owns something else.
That’s why we use apostrophe + s.
Plural Possessive Nouns
Things get slightly more interesting when multiple people own something.
If a plural noun already ends in s, simply add an apostrophe after the s.
Example:
The players’ uniforms were stored in the equipment room.
There are multiple players.
The uniforms belong to those players.
So the apostrophe goes after the s.
Compare These Carefully
One player:
The player’s uniform
Multiple players:
The players’ uniforms
Notice how the apostrophe moves.
That tiny difference completely changes the meaning of the sentence.
On the SAT, a misplaced apostrophe can turn one owner into many owners—or vice versa.
Irregular Plural Nouns
Some plural nouns don’t end in s.
Examples include:
- children
- men
- women
- people
- mice
For these nouns, add apostrophe + s.
Examples:
The children’s playground was recently renovated.
The women’s soccer team won the tournament.
The people’s voices were finally heard.
Even though these nouns are already plural, they don’t end in s, so they still take apostrophe + s.
Possessive Pronouns: The SAT’s Sneaky Trap
Some words already show possession and do not need apostrophes.
Examples include:
- its
- theirs
- yours
- ours
- hers
Examples:
The school updated its schedule.
The victory was theirs.
Is this backpack yours?
These words are already possessive.
No apostrophe is needed.
One of the SAT’s favorite tricks is adding apostrophes where they don’t belong.
Its vs. It’s
This may be the most commonly tested apostrophe question on the SAT.
Possessive:
The restaurant changed its menu.
The menu belongs to the restaurant.
No apostrophe.
Contraction:
It’s getting late.
Here, “it’s” means:
it is
The apostrophe replaces the missing letter.
A helpful trick:
If you can replace “it’s” with “it is,” the apostrophe is correct.
If you can’t, you probably want “its.”
Their, They’re, and There
These words sound alike, but they have very different meanings.
Their
Shows possession.
Their coach encouraged them before the game.
The coach belongs to them.
They’re
A contraction meaning:
they are
Example:
They’re studying for the SAT this weekend.
There
Refers to a place or location.
The library is over there.
When you see one of these words on the SAT, slow down and think about the meaning of the sentence.
Whose vs. Who’s
This pair causes trouble for many students.
Whose
Shows possession.
Whose notebook is on the table?
The notebook belongs to someone.
Who’s
Means:
who is
Example:
Who’s leading the discussion today?
You can test it by replacing it with “who is.”
If the sentence still works, “who’s” is correct.
Why the SAT Tests Apostrophes
The SAT isn’t really testing punctuation.
It’s testing whether you understand relationships between words.
Can you tell:
- who owns something?
- whether a word is showing possession?
- whether an apostrophe is indicating ownership or replacing missing letters?
These questions require you to focus on meaning, not just memorize rules.
Final Thoughts
When you encounter an apostrophe question on the SAT, don’t panic.
Instead, ask yourself one simple question:
Who owns what?
If ownership is being shown, you’re probably dealing with a possessive apostrophe.
If letters have been removed from a word, you’re probably dealing with a contraction.
That simple habit can help you avoid some of the most common apostrophe mistakes students make on test day.
And the best part? Once you start thinking about ownership instead of punctuation, apostrophe questions suddenly become a lot easier to understand.